JPH04108915A - Construction method for reinforced banking body - Google Patents

Abstract

PURPOSE:To simplify the construction work and improve the draining ability in a banking by throwing in drainage materials and banking materials inside slope forming frames on which a reinforcing sheet is laid to form a banking body, thereafter constructing a retaining wall by spacer-rods and forms. CONSTITUTION:A slope forming frame 1 is installed on the ground, and the end parts of spacer-rods 2 capable of being adjusted to expand and contract the length are penetrated through slope frames 11 and fixed to them. Next drainage materials 5 and banking materials 6 are thrown on the upper face of a reinforcing sheet 3 such as geo-textile, etc., and the end part of the drainage materials is wrapped up with the upper part of a water-permeable sheet put on the slope frames 11 to prevent fall-down of the drainage materials. After these operations are repeated in sequence to form a banking body, forms 7 are assembled to the spacer-rods 2 along the slope frames 11 at specified intervals, and between the slope frames and the forms, concrete is placed to construct a retaining wall 8. Thus, the banking body can be reinforced to improve its stability.

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a method for constructing a reinforced embankment.

<Conventional technology> Conventional reinforced embankment construction methods include a construction method using sandbags.

That is, as shown in Fig. 6, a reinforcing sheet b such as ciotextile is laid with sandbags a wrapped around its edges,
In this method, an embankment material C such as earth and sand is placed on the upper surface of the reinforcing sheet a, and the embankment material C is laminated in multiple layers to construct an embankment body.

<Problems to be Solved by the Present Invention> The conventional reinforced embankment construction method described above has the following problems.

<B> The conventional construction method uses a large number of sandbags a, and these sandbags a are made one by one by hand at the site by filling the bags with soil, etc., which is very time-consuming and reduces work efficiency. was causing a decline in

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<C> Since the sandbag a has low water permeability, drainage in the embankment is not sufficient during rain or the like.

Therefore, the structural stability of the embankment body may be reduced.

(2) Drainage is particularly important when the slope is a type D retaining wall as shown in Figure 6, but when using sandbags A, there are structural problems due to poor drainage. There is.

That is, in the present invention, a reinforcing sheet is laid with one end fixed to a water-permeable frame that forms the slope of an embankment, and a drainage material is placed on the upper surface of the end of this reinforcing sheet on the frame side, thereby reinforcing the slope. An embankment body is constructed by inserting embankment materials into areas other than the drainage material input area on the sheet, and after this embankment body is constructed by laminating one or more layers, an expandable spacer is placed on the slope of the frame. One end of the rods is connected, and a formwork is attached to the free end of this spacer rod at a certain distance from the frame, and concrete is poured between the formwork and the frame to form a retaining wall on the side of the embankment. This is a method of constructing a reinforced embankment.

<Object of the present invention> The present invention was made in order to solve the above-mentioned problems, and provides a reinforced embankment body that can simplify the construction work of the embankment body and improve drainage performance in the embankment. The purpose is to provide a construction method.

〈Means for solving problems〉 <Description of the present invention> The present invention will be explained in detail below.

<A> Slope forming frame (Fig. 2) The slope forming frame 1 is a lightweight frame member manufactured in a factory.

For example, as shown in FIG. 2, two rectangular slope frames 11
and the grounding frame 12 are joined on one side so that they are at right angles,
A conceivable structure is that an angle 13 is attached as a reinforcing material between two frame members.

Further, a water-permeable wire mesh 14 is fixed to the slope frame 11 by welding or the like.

A plurality of slope forming frames 1 are arranged at predetermined positions on the ground, as shown in FIG.

When arranging them, place the grounding frames 12 on the ground facing the planned construction side of the embankment, raise the slope frames 11, and form the slope part of the embankment with a plurality of slope frames 11. Arrange in.

<Opening> Spacer rod (Fig. 3.4) The spacer rod 2 consists of both threaded rods 21 and 22 with threads carved on both ends.
It has a structure in which they are connected by a joint 23 with screw holes opened in the axial direction from both end faces.

Therefore, by rotating both threaded rods 22 or 21, the length in the axial direction can be adjusted.

Furthermore, one end surface side of a connector 24 is attached to the free ends of both threaded rods 22, and a short threaded rod 25 is attached to the other end surface side of this connector 24 in the direction of extension of both threaded rods 22.

The free ends of both threaded rods 21 of this spacer rod 2 are passed through the slope frame 11 of the slope forming frame 1 and fixed with nuts 26, as shown in FIG.

<C> Reinforcement Sheet (Fig. 2) Since the reinforcement sheet 3 is to take a reaction force in the embankment to prevent the slope portion from collapsing, a sheet member having a predetermined strength is used.

For example, a known sheet member such as geotextile can be used.

In addition, the reinforcing sheet 3 is made of water-permeable material so that drainage in the embankment can be carried out well.

Then, one end of this reinforcing sheet 3 is fixed to the grounding frame 12 of the slope forming frame 1, as shown in FIG.

Then, the reinforcing sheet 1 is laid down for a predetermined length on the side of the embankment where construction is planned.

The laying length and area of the reinforcing sheet 3 are designed to provide sufficient frictional resistance during the embankment so that the slope portion of the embankment does not collapse.

<2> Water-permeable sheet (FIG. 2) As shown in FIG. 2, a water-permeable sheet 4 having a larger area than the slope frame 11 is placed on the inside of the slope frame 11.

At this time, the upper part of the water permeable sheet 4 is made to protrude from the upper part of the slope frame 11, and the lower part of the water permeable sheet 4 is overlapped with the reinforcing sheet 3.

This water-permeable sheet 4 serves to prevent the drainage material 5 from falling through the holes in the wire mesh 14.

<E> Adding drainage material and embankment (Fig. 1.2) Drainage material 5 such as crushed stone is placed in the slope forming frame 1 on which the reinforcing sheet 3 and permeable sheet 4 are laid as described above using a shovel car or human power. Insert.

Next, the upper part of the permeable sheet 4 is folded back to the drainage material 5 side,
It wraps around the drainage material 5 and prevents it from falling through the holes in the wire mesh 14.

Finally, embankment material 6 such as earth and sand is placed on the reinforcing sheet 3 at a portion other than the portion where drainage material 5 is placed.

The height of the filling material 6 shall be approximately equal to the height of the slope frame 1].

Thereby, since the reinforcing sheet 3 is buried in the embankment, it can serve as an amplifier 1- of the slope forming frame 1 and prevent the slope forming frame 1 from falling to the opposite side of the embankment.

By repeating the above operations upward and stacking the embankments, a multi-layer embankment as shown in FIG. 1 can be constructed.

When constructing a multi-layered embankment, stability can be improved by building the embankment in a stair-like manner, with the upper tier being shifted inward than the lower tier.

<Go> Construction of a retaining wall (Fig. 1.3) As shown in Fig. 1, after constructing the embankment body to a predetermined height, at the free ends of the spacer rods 2 protruding from each slope frame 11, Attach formwork 7 for concrete pouring.

When installing the formwork 7, as shown in FIG.
4 and nuts 27 to tighten the formwork 7.

Then, forms 7 are assembled along the slope frame 11 at predetermined intervals, concrete is placed between the slope frame 11 and the form 7, and the retaining wall 8 is constructed.

At this time, the concrete placement pressure acts on the formwork 7, but the formwork 7 can take a reaction force to the embankment body by the plurality of spacer lots 2, so that the retaining wall 8 can be reliably constructed. I can do it.

Furthermore, when adjusting the wall thickness of the retaining wall 8, the dimension between the formwork 7 and the slope frame 11 can be arbitrarily selected by changing the length of the spacer rod 2. The designed wall thickness can be secured.

<G> Other structures of the spacer lot (Fig. 5) When concrete is poured as described above, the embankment body sinks significantly, and the embankment side portion of the spacer rod is pulled downward, causing cracks in the concrete. There is a possibility that this may occur.

In such a case, as shown in Fig. 5, a pipe body such as a PVC pipe 9 is placed around the spacer rod between the formwork 7 and the slope frame 11, and the edge of the concrete is cut off. One possible method is to remove the spacer rod after casting.

Specifically, the fixing ret 8 is attached to the slope frame 11 by welding or the like, and both threaded rods 81 are passed through the fixing nut 8 and attached.

On the other hand, the free ends of both threaded rods 81 are fixed by passing through the formwork 7.

For example, a form tie 82 is attached to the penetrating end of the formwork 7 of both threaded rods 81, a horizontal butterfly 84 is interposed, and a nut 84 is attached.
Tighten and secure.

The lengths of both threaded rods 81 are adjusted by rotating both threaded rods 81 within the range in which the threaded portions 85 of the slope frame 11 are carved.

<Effects of the Present Invention> Since the present invention has been described above, the following effects can be expected.

<A> In the present invention, a slope forming frame manufactured in a factory is arranged, and drainage material is introduced into the frame using a shovel car or the like.

Therefore, it is possible to save the labor of manufacturing a large number of sandbags one by one by manually filling the bags with soil and sand, as in the past.

Therefore, work efficiency can be dramatically improved.

<Mouth> Conventional sandbags are heavy and need to be stacked manually, making stacking them extremely difficult.

On the other hand, since the slope forming frame of the present invention is a lightweight frame-like body, it can be easily stacked and installed.

<C> The slope forming frame is configured to allow water to pass through.
Drainage material is also added to this frame.

Moreover, this drainage material is not filled into a water-impermeable bag like conventional sandbags, but is directly placed into the frame.

Therefore, drainage in the embankment during rainy times can be carried out well, and the structural stability of the embankment body can be improved.

(2) It is advantageous because the drainage layer on the back side of the retaining wall can be easily constructed.

<E> By using spacer rods when assembling the formwork for concrete pouring, the embankment body itself can absorb a reaction force against concrete pouring pressure, especially lateral pressure.

Therefore, a retaining wall can be reliably constructed.

Further, conventionally, it was necessary to assemble shoring on the outside of the formwork, but in the present invention, such shoring is not necessary, so it is possible to shorten the construction period and reduce construction costs.

By adjusting the length of the spacer rod, the distance between the formwork and the slope frame can be arbitrarily selected.

Therefore, the wall thickness of the retaining wall can be easily changed.

[Brief explanation of the drawing]

Fig. 1: Overall diagram of the embankment structure of the present invention Fig. 2: Explanation of the slope forming frame Fig. 3.4 An explanatory diagram of the structure of the varnish spacer-rod Fig. 5 An explanatory diagram of other structures of the varnish spacer-rod Figure 6: Illustration of conventional technology

Claims (1)

[Claims] (1) A reinforcing sheet is laid with one end fixed to the water-permeable frame that forms the slope of the embankment, drainage material is placed on the upper surface of the end of the reinforcing sheet on the frame side, and drainage material is placed on the reinforcing sheet. An embankment body is constructed by inserting embankment materials into areas other than the drainage material input area, and after this embankment body is constructed by laminating one layer or multiple layers, an expandable spacer rod is placed on the slope of the frame. One end of the spacer rod is connected, and a formwork is attached to the free end of the spacer rod at a certain distance from the frame, and concrete is poured between the formwork and the frame to construct a retaining wall on the side of the embankment. A method of constructing reinforced embankments.